In Reply to: Loftin White 2A3 voltage high posted by Gerado on January 30, 2007 at 00:57:52:
You need to add a B+ drop resistor to get it down,bring down the K-A (cathode to Anode) of 2A3 back to 250V (per RCA spec. of 250V @60mA).To calculate this is to take a reading on your B+ end with the total current consumption, and calculated the proper voltage drop needed in order to bring your B+ down using Ohm's law (V=IR). 100R may not be enough in your case (you need to raise it proportionately to get the appropriate voltage drop.
Another alternative ways is to get a different mains transformer that suits your need. I've been asking ISO-Tango to get custom-wound mains transformer for my LW2A3 amp projects for years and it's been very satisfying so far.
q.
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Follow Ups
- Re: Loftin White 2A3 voltage high - Quest 09:38:36 01/30/07 (4)
- Put the voltage to good use - David McGown 01:34:32 01/31/07 (3)
- Re: Put the voltage to good use - Gerado 15:22:11 02/01/07 (2)
- Re: Put the voltage to good use - David McGown 16:53:07 02/01/07 (1)
- Re: Put the voltage to good use - Gerado 22:32:43 02/01/07 (0)